Company lists · Data refreshed September 2026

Top 25 Oilfield services companies based in the United States

Name: Oilfield services companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 7, 2026 2,254 companies tracked

This directory lists 2,254 oilfield services companies based in the United States, with contact coverage including 315,618 contacts and 88,606 email addresses. As of September 2026, Houston is the single most-represented city among the companies on this list.

Oilfield services companies provide specialized equipment, field operations, technical support, and maintenance for oil and gas exploration, drilling, production, and related activities. This list covers companies that provide services, equipment, technical support, or field operations for oil and gas exploration, drilling, production, or maintenance. Ranked by team size, largest first. Data current as of September 7, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 7, 2026 86% judged on-target in blind review

2,254Companies

315,618Contacts tracked

88,606Verified emails

62,224Mobile numbers

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The 25 largest oilfield services companies based in the United States

Ranked by team size

Top 25 of 2,254 oilfield services companies based in the United States, ranked by team size, largest first. Data refreshed Sep 7, 2026. RevenueBase Smart Search rates how each company's information relates to oilfield services companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SLB	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	76,561 contacts →
	Indirect evidence “SLB is a global technology company that has driven energy innovation for more than a century.” Source: RevenueBase Database · checked Sep 7, 2026
2	Baker Hughes	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	61,166 contacts →
	Indirect evidence “Baker Hughes (NASDAQ: BKR) is an energy technology company that provides solutions for energy and industrial customers worldwide.” Source: RevenueBase Database · checked Sep 7, 2026
3	Halliburton	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 7, 2026
4	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 7, 2026
5	Noble Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	5,001-10,000	5,601 contacts →
	Indirect evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 7, 2026
6	FMC Technologies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	4,749 contacts →
	Indirect evidence “FMC Technologies is now TechnipFMC.” Source: RevenueBase Database · checked Sep 7, 2026
7	NESR	Strong evidence	Houston, United StatesHQ checked Sep 7, 2026	5,001-10,000	3,683 contacts →
	Strong evidence “National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…” Source: RevenueBase Database · checked Sep 7, 2026
8	Tidewater	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	5,001-10,000	3,290 contacts →
	Indirect evidence “Tidewater Inc.(Tidewater) is the owner and operator of the world’s largest Offshore Support Vessel (OSV) fleet.” Source: RevenueBase Database · checked Sep 7, 2026
9	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	5,001-10,000	3,173 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 7, 2026
10	KEY Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	2,755 contacts →
	Indirect evidence “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Source: RevenueBase Database · checked Sep 7, 2026
11	Patterson-Uti	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	10001+	2,317 contacts →
	Indirect evidence “Patterson-UTI is a leading provider of drilling and completion services to oil and natural gas exploration and production companies in the United States and other select…” Source: RevenueBase Database · checked Sep 7, 2026
12	OIL States International	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	5,001-10,000	2,215 contacts →
	Indirect evidence “Oil States International, Inc.” Source: RevenueBase Database · checked Sep 7, 2026
13	Superior Energy Services	Strong evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,938 contacts →
	Strong evidence “For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…” Source: RevenueBase Database · checked Sep 7, 2026
14	Helix Energy Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,706 contacts →
	Indirect evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 7, 2026
15	Weir OIL And GAS	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 7, 2026	n/a	1,651 contacts →
	Indirect evidence “Caterpillar Inc.(NYSE:CAT) has completed its acquisition of the Oil & Gas Division (“Weir Oil & Gas”) of the Weir Group PLC, a Scotland-based global engineering business.” Source: RevenueBase Database · checked Sep 7, 2026
16	PMI	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 7, 2026	n/a	1,308 contacts →
	Indirect evidence “Training and Development Solutions” Source: RevenueBase Database · checked Sep 7, 2026
17	R Associates INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	n/a	1,301 contacts →
	Indirect evidence “Based in Houston, RAI has been in business over 30 years, providing hardware, support and professional services to Oil and Gas companies around the world.” Source: RevenueBase Database · checked Sep 7, 2026
18	Cudd Energy Services	Strong evidence	The Woodlands, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,285 contacts →
	Strong evidence “Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.” Source: RevenueBase Database · checked Sep 7, 2026
19	Forum Energy Technologies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,262 contacts →
	Indirect evidence “FET (Forum Energy Technologies, Inc.) is a global company, serving the crude oil, natural gas, and renewable energy industries.” Source: RevenueBase Database · checked Sep 7, 2026
20	Newpark	Indirect evidence	Katy, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,244 contacts →
	Indirect evidence “Newpark Fluids Systems is the world’s leading pure-play oil & gas and geothermal fluid solutions provider.” Source: RevenueBase Database · checked Sep 7, 2026
21	Stewart & Stevenson	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	1,135 contacts →
	Indirect evidence “Stewart & Stevenson is a leading designer, manufacturer and provider of specialized equipment and aftermarket parts and service for the oil and gas and other industries that we…” Source: RevenueBase Database · checked Sep 7, 2026
22	C&j Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	5,001-10,000	1,071 contacts →
	Indirect evidence “NexTier is a leading provider of integrated completions focused on the most demanding land basins in the US.” Source: RevenueBase Database · checked Sep 7, 2026
23	KLX Energy Services	Strong evidence	Houston, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	857 contacts →
	Strong evidence “KLX Energy Services provides more than 100 mission-critical oilfield services, tools, technologies and equipment to some of the industry’s leading operators.” Source: RevenueBase Database · checked Sep 7, 2026
24	Innovex	Indirect evidence	Humble, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Innovex International, Inc (NYSE: INVX) is a Houston-based company established in 2024 following the merger of Dril-Quip, Inc and Innovex Downhole Solutions.” Source: RevenueBase Database · checked Sep 7, 2026
25	Propetro Services, INC	Strong evidence	Midland, TX, United StatesHQ checked Sep 7, 2026	1,001-5,000	820 contacts →
	Strong evidence “We are a Midland, Texas-based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the…” Source: RevenueBase Database · checked Sep 7, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: oilfield services companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names oilfield services companies.
Partial evidence: Its own public description names part of oilfield services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oilfield services companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 2,254 oilfield services companies based in the United States

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Oilfield services companies based in the United States at a glance

As of Sep 7, 2026

28.1%Verified-email coverage

19.7%Mobile-number coverage

140.0Average contacts per company

11-50Median size (employees)

16.6%Largest-city concentration · Houston

Sep 7, 2026Page data refreshed

Companies by employee count

1-10

608

11-50

776

51-200

577

201-500

150

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

79,0920–30

6,03831–60

3061–90

1190–180

3,435180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oilfield services companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “oilfield services companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names oilfield services companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among oilfield services companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 88,606 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 7, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Oilfield services companies by metro

Frequently asked

How many oilfield services companies are based in the United States?

This directory contains 2,254 oilfield services companies based in the United States as of September 2026.

What do oilfield services companies do?

Oilfield services companies support oil and gas operations through equipment, field services, technical work, maintenance, and related operational support.

Which city has the most oilfield services companies on the list?

Houston is the single most-represented city among the companies on this list.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.